Device for wire drawing machines, rolling mills, etc.



1960 B. D. s. LC5FBERG 2,947,201

DEVICE FOR WIRE DRAWING MACHINES, ROLLING MILLS ETC.

Filed Dec. 23, 1953 v lle/1731': 61 44 Jaw-1d tor.

DEVICE FOR WIRE DRAWING MACHINES, ROLLING MILLS, ETC.

Birger David Sigvard Liifberg, 29 Hantverkargatan, Motala, Sweden Filed Dec. 23, 1953, Ser. No. 399,954

Claims priority, application Sweden Dec. 23, 1952 Claims. to]. 74-7055 machines, that the power necessary for at leasttwo drawing drums, rolls etc. is transmitted from one single power source, and that the relation of the rotational speed of the drawing drums or the rolls, respectively, is controlled mutually with regardto the variation of length to which the drawn material has been exposed while drawn or rolled. x

According to a feature of the invention the drawing drums or rolls, respectively, driven from a common power source are freely rotatable and carry a planetary gear means, which is in driving connection with a driving input shaft and an output shaft, and that the output shaft for a particular drawing drum is in driving connection with the input shaft for the following drawing drum or roll, respectively, with exception for the last one of commonly driven drawing drums or rolls, respectively, said last drawing drum or roll being directly or indirectly (by means of a gear) coupled to the output shaft which is driven from the planet gears of the last but one of the commonly driven drawing drums.

. The last one of the drawing drums driven from a common power source may thus be connectedto the output shaft driven from the. planet gears ofthe last but one drawing drum over a fixed gear but mayalso be driven' from the planet gears of the same kind asthe rest of the commonly driven drawing drums, and may be constructed in the same manner as these drawing drums. The output shaft from this last planet gear is thus subjected to torque, and may for this purpose be provided with a. coupling clutch, by means of which it is kept at rest or connected to a brake, e.g. an electric genera- It is obvious that the blocking of the coupling between the last drawing drum and the outgoing shaft of the planet gear for the last but one drawing drum ina machine provided with the same design of the driving means for the last drawing drum as for the other drawing drums of the machine, can be achieved by preventing an internal movement of the wheelsof the planet gears means.

The planet gear means for a drawing drum unit may be arranged in the drawingdrum proper, which in such case is arranged as carrier for the shafts, of the planet wheels and possible intermediate wheels, if any, or driven by a drum carrying the planet wheels, directly or via a gear with a suitable speed ratio. It is obvious that the speed ratiosof an epicyclic train including planet gears, as well known, may be chosen differently with respect to the desired speeds of thedriving shafts and the drawing drums.

-Patented Aug. 2, 1960 respective drawing drums etc. The planet wheels of the different drawing drums transfer the moment necessary for the respective drum by means of shafts mounted in the drum. In order to facilitate the insertion of the drawn material, the machine may be provided with a gear at the first drawing drums etc., by means of which a certain fixed gearing ratio is obtained between the input and output shafts of the drums in question.

Further characteristics of the invention may appearv from the following, more detailed description with reference to the accompanying drawing illustrating an example of a machine according to the invention. In the single figure a machine for drawing wire is shown. This machine comprises four drawing drums and three drawing dies, 5, 6, 7, therebetween, through the apertures of which the wireis drawn in the direction of the arrow A. On the same shaft as the drum 4 a further drum for finished wire may be arranged- The wire material comes from a further let-off drum not shown in the figure and is in one or more turns arranged around the three drawing drums 1, 2 and 3. l

The driving source, which is not shown in the figure, and which may be of any suitable kind, drives a shaft 9, on which is secured a bevel gear wheel 10, rotating in the direction of the'arrow K. The bevel wheel 10 is in mesh with a pinion wheel 11 rotating in the direction of the arrow K2, which issecuredto a shaft 12. This input shaft 12 is by means of a sleeve 13 rotatably carried in the center of the drawing drum 1, the drawing drum 1 the drum. The reversing spur gear 18, which thus rotates in the direction K3, is in its turn in mesh with a planetary gear 21, which by means of a sleeve 22 is carried rotatably by a shaft 23 secured to the drum 1 and thercover 14. The shaft 23 is parallel to shaft 20 and arranged eccentrically. The planetary spur gear 21, rotating in the direction of the arrow K2, is in the direction towards cover 14 provided with an elongated shaft 24 secured to the planetary gear 25, rotating in the direction of the arrow K2. The planetary gear 25 is in mesh with a further spur wheel 26, rotating in the direction of arrow K3, which by means of a key 27 is secured to one end of a hollow output shaft 28 arranged around the input shaft 12, the other end of which is secured by means of a key 29 to a bevel gear 30 rotating in the direction of the arrow K3 and in mesh with a pinion wheel 31, rotating in the direction of arrow K1, and secured to one end of a coupling shaft 32. Since the drum 1 constitutes a a planetary gear carrier, the arrangement described will transmit a torque to the drum 1 and to the output shafts 28 and 32 when the wire 8 is drawn through the drawing dies.

A similar epicyclic train arrangement as the one just described is coupled to the shaft 32 for controlling the rotational speed of the drum 2 and is coupled by a shaft 33 to a third epicyclic train arrangement with similar construction for the drum 3. This third epicyclic drum arrangement is coupled by means of shaft 34 to a transmission means for driving the drum 4 for winding-up the wire. secured to the shaft 34 and in mesh with a pinion wheel 7 36 secured to a shaft 34, to which the drum 4 is secured The transmission consists of a bevel gear 3:5

and which consequently constitutes the input shaft for 16, l, 18, 21, 25, 26 may be chosen in dependence of the torque moments, to which the forces above give rise, and which may be computed.

As already mentioned the arrangement may be provided with a coupling transmission means between the input and output shafts of the drawing drums by means of which the driving force is directly transferred to the following drawing drum. In the drawing a by-pass transmission means of this kind is shown. For the drum 1 it consists of a spur gear wheel 38 secured to the shaft 9 and being in mesh with a further spur wheel 39 rotatably secured at one end of'a shaft 40' parallel to the shaft 9, one end of said shaft 40 being connected by a coupling means 41 to one end of a further shaft 42 arranged aligned with shaft 40, said shaft 42 carrying a spur wheel 43 in mesh with a further spur Wheel 44 fastened to the shaft 32.

, Similar coupling clutches are provided also for the further drawing drums of the machine. The shafts 9, 32, 33 and 34 may be provided with couplings 38' in order to make it possible to arrange each drawing drum as a separate unit.

A consider-able advantage with an arrangement accordeccentrically mounted in the drawing drum 1' which acts as planetary gear carrier. The planetary gear 25 meshes with the output sun gear 26 which is fixed on the output shaft 28. Output shaft 28 drives through transmission means 30, and 31, the coupling shaft 32. Coupling shaft 32 has the same function with respect to drawing drum 2, as has shaft 9 with respect to drawing drum 1. As

explained above, each of the drums 2 and 3 is provided with transmission means and an epicyclic gear train, as described with reference to drawing drum 1. The shaft 33 performs the function of shaft 9 for drawing drum 3, and the shaft 34 performs the function of shaft 9 for drawing drum 4. When the coupling means 41 is connected, the shaft 9 is directly coupled to the shaft 32, and the drawing drum 1 is inactivated. Coupling means 38' permit the removal of a thus inactivated drawing drum unit including all gears associated therewith.

The driving torque of input shaft 12 is divided between the drum 1 and the output shaft 28. The ratio between the output torques depends on the torque produced by the drawn wire on the drum 1, or on any other drum. For example, if the wire would exert no resistance to the turning of drum 1, drum 1 would idle. In the event that any of the drawing drums is prevented from rotating by its frictional engagement with the drawn wire, the torque is transferred from the input shaft through the epicyclic train 16, 13, 21, 25, 26 to the output shaft 28 so that maximum torque is transmitted to the next successive input shaft of the next following drawing drum which acts with a greater torque on the drawn wire until the force applied to the non-rotating drum again rotates. In the normal condition of the apparatus each drum will irotate at such a speed as to take up the increased length of the drawn wire, while the torques are correspondingly distributed over the seevral drawing drums.

Wherever extra torque is required, it will be built up in the respective drum due to the fact that a single power source provides the total torque which is then distributed by the epicyclic gear trains of the drums between the drums. Due to the fact that the planetary gear means 21 and 25 are directly mounted on a drawing drum, the drum becomes part of an epicyclic gear train, since it is used as the planetary gear carrier; Due to the arrangement of the present invention in which the output and 7 input shafts, as well as the sun gears and planetary gear means of the epicyclic train. are mountedon the associated drawing drum, it is possible to separate each drum unit completely from the other drum unit, and to remove a drum unit for repair or adjustment.

The invention is not limited to the embodiment described above and shown in the figure but may be varied in different manners within the scope of following claims.

I claim:

1. In a machine, in combination, at least two rotary sun gear means operatively connecting said plentary gear means with said output shaft so that said one drum and said output shaft are driven from said input shaft, said one drum being turnable relative to said input and output shafts and constituting the planetary gear carrier of an epicyclictrain including said sun gear means and planetary gear means; transmission means connecting said output shaft with-the other drum for driving the latter; and by-pass transmission means connecting said input shaft with said transmission means and including coupling means so that said input shaft is directly connected to said other drum when said coupling means is in a coupled position whereby the unit constituted by said one drum, said sun gear means and said planetary gear means is inactivated.

2. In a machine, in combination, a plurality of rotary drums; a first rotatably mounted input shaft associated with one of said drums and adapted to be rotated; a plurality of output shafts, each of said output shafts being respectively associated with a drum of said plurality of drums other than said one drum; a plurality of second input shafts respectively associated with one of said plurality of drums other than said one drum; said drums being turnable relative to said input and output shafts; a plurality of transmission means, each transmission -means respectively connecting an output shaft with the second input shaft of the next successive drum; an input sun gear means fixedly connected to each input shaft; planetary gear means turnably mounted on each drum and being driven from said input sun gear means; and an outi put sun gear means operatively connecting the planetary gear means of each drum with the respective output shaft so that each drum and its associated output shaft are driven solely from the respective associated input shaft and so that each drum constitutes the planetary gear carrier of an epicyclic train which includes the respective sun gear means and planetary gear means.

3. Apparatus as claimed in claim 2 and including a reversing gear means meshing with said planetary gear means and with said input sun gear means of each drum.

4. In a machine, in combination, a plurality of rotary drums; a rotatably mounted first input shaft associated with one of said drums and adapted to be rotated; a plurality of output shafts, each of said output shafts being respectively associated with one of said plurality of drums; a plurality of second input shafts, each of said second input shafts being respectively associated with one of said plurality of drums other than said one drum, each of said input shafts being coaxial with its respective output shaft and with the respective associated drum; said drums being tumable relative to said input and output shafts; a plurality of transmission means, each of said plurality of transmission means connecting respectively an output shaft with the input shaft of the next successive drum; an input sun gear means fixedly connected to each input shaft; planetary gear means turnably mounted on each drum and being driven from said input sun gear means; and an output Sun gear means operatively connecting the planetary gear means of each drum with the respective output shaft so that each drum and its associated output shaft are driven solely from the respective associated input shaft and so that each drum constitutes the planetary gear carrier of an epicyclic train which includes the respective sun gear means and planetary gear means.

5. An arrangement as claimed in claim 2 including a plurality of by-pass transmission means, each of said plurality of by-pass transmission means respectively connecting each of said input shafts with the transmission means which is connected to the output shaft associated with the same drum as the respective input shaft, each by pass transmission means including coupling means so that each of said input shafts is directly connected to the next successive drum when said coupling means is in a coupled position whereby each unit constituted by a drum, and the respective sun gear means and planetary gear means is inactivated.

References Cited in the file of this patent UNITED STATES PATENTS 712,528 Haywood Nov. 4, 1902 994,631 Berrigan June 6, 1911 1,441,707 Oslund I an. 9, 1923 1,728,899 Hegeler et al. Sept. 17, 1929 2,062,723 Nacken Dec. 1, 1936 2,138,126 Smithet al. NOV. 29, 1938 FOREIGN PATENTS 121,826 Great Britain Jan. 9, 1919 584,510 Great Britain Jan. 16, 1947 

